U.S. patent application number 10/049780 was filed with the patent office on 2003-07-24 for method for preparing resin-coated sheet.
Invention is credited to Watanabe, Kazue.
Application Number | 20030136501 10/049780 |
Document ID | / |
Family ID | 18681606 |
Filed Date | 2003-07-24 |
United States Patent
Application |
20030136501 |
Kind Code |
A1 |
Watanabe, Kazue |
July 24, 2003 |
Method for preparing resin-coated sheet
Abstract
After an aqueous emulsion of a non-tacky or weakly tacky acrylic
copolymer 4 has been infiltrate into a moisture-permeable sheet
material 2 throughout almost the entire range in its thickness
direction, the sheet material is dried while keeping one side of
the sheet material in close contact with a non-moisture-absorptive
protection sheet 3 having a smooth surface. Then a transparent
coating film 8 having a smooth surface and consisting of the dried
non-tacky or weakly tacky acrylic copolymer 4 is formed on the one
side of the sheet material by stripping the protection sheet from
the one side of the sheet material.
Inventors: |
Watanabe, Kazue; (Tokyo,
JP) |
Correspondence
Address: |
Jordan and Hamburg
122 East 42nd Street
New York
NY
10168
US
|
Family ID: |
18681606 |
Appl. No.: |
10/049780 |
Filed: |
March 1, 2002 |
PCT Filed: |
May 11, 2001 |
PCT NO: |
PCT/JP01/02960 |
Current U.S.
Class: |
156/247 ;
156/280 |
Current CPC
Class: |
D06M 15/263 20130101;
D21H 19/20 20130101; B05D 1/40 20130101; B05D 3/0254 20130101; D21H
17/37 20130101; D06N 3/0077 20130101; D06N 3/042 20130101; B05D
1/42 20130101; D21H 25/08 20130101 |
Class at
Publication: |
156/247 ;
156/280 |
International
Class: |
B32B 031/00 |
Foreign Application Data
Date |
Code |
Application Number |
May 11, 2000 |
JP |
2000-180539 |
Claims
What is claimed is:
1. A method for manufacturing a resin-coated sheet, comprising the
steps of: infiltrating an aqueous emulsion of a non-tacky or weakly
tacky acrylic copolymer having water as a main evaporation
ingredient into a moisture-permeable sheet material throughout
almost the entire range in its thickness direction; placing a
non-moisture-absorptive protection sheet which has a smooth surface
on and in close contact with one side of said sheet material and
then drying said sheet material; and forming a transparent coating
film which has a smooth surface and comprises a dried non-tacky or
weakly tacky acrylic copolymer, on one side of said sheet material
by stripping said protection sheet from said sheet material.
2. The method according to claim 1 further comprising the step of
forming a strongly adhesive coating film on the other side of said
sheet material by applying an aqueous emulsion of a strongly tacky
acrylic copolymer wholly or partially to the other side of said
sheet material and then drying it, after said sheet material has
dried.
3. The method according to claim 1 further comprising the step of
forming a strongly tacky coating film on a surface of said
transparent coating film by applying an aqueous emulsion of a
strongly tacky acrylic copolymer wholly or partially to the surface
of said transparent coating film formed on the one side of said
sheet material.
4. The method according to claim 1 or 3 further comprising the
steps of: infiltrating an aqueous emulsion of a non-tacky or weakly
tacky acrylic copolymer into the other side of said sheet material,
after said protection sheet has been stripped from the one side of
said sheet material; drying said sheet material while keeping the
other side of said sheet material in close contact with a
non-moisture-absorptive protection sheet having a smooth surface;
and forming a transparent coating film having a smooth surface and
consisting of a dry non-tacky or weakly tacky acrylic copolymer
onto the other side of said sheet material, by stripping said
protection sheet from the other side of said sheet material.
5. The method according to claim 4 further comprising the step of
forming a strongly adhesive coating film on a surface of said
transparent coating film at the other side of said sheet material
by applying an aqueous emulsion of a strongly tacky acrylic
copolymer wholly or partially to the surface of said transparent
coating film and drying it.
6. The method according to claim 1 or 4, wherein said aqueous
emulsion of the non-tacky or weakly tacky acrylic copolymer is
beforehand applied to the surface of said protection sheet, and
said aqueous emulsion is infiltrated into said sheet material by
sticking said sheet material on the surface.
7. A method for manufacturing a resin-coated sheet, comprising the
steps of: infiltrating an aqueous emulsion of a non-tacky or weakly
tacky acrylic copolymer into a moisture-permeable sheet material
throughout almost the entire range in its thickness direction;
drying said sheet material; and forming a strongly tacky coating
film on one side or both sides of said sheet material by applying
an aqueous emulsion of a strongly tacky acrylic copolymer wholly or
partially to one side or both sides of said sheet material and
drying it.
8. The method according to any of claims 1 to 7, wherein said sheet
material consists of a cloth, paper, or sponge.
9. The method according to any of claims 1 to 9, wherein dryness of
sheet material is performed at a temperature of not more than 160
degrees C.
10. The method according to claim 1, 4 or 7, wherein said aqueous
emulsion of the non-tacky or weakly tacky acrylic copolymer
includes water of not less than 60 weight %.
11. The method according to claim 2, 3, 5 or 7, wherein said
aqueous emulsion of the strongly tacky acrylic copolymer includes
water of not less than 50 weight %.
Description
TECHNICAL FIELD
[0001] The present invention relates to a method for manufacturing
a resin-coated sheet and, more particularly, to a method for
manufacturing a resin-coated sheet having a transparent resinous
film having a smooth surface, and to a method for manufacturing a
tacky resin-coated sheet.
BACKGROUND ART
[0002] There has been known a seal etc. which has on its back side
a tacky layer and is strippable and reusable many times. However, a
large-scale production equipment or special-purpose machines were
needed to manufacture it. Further, several methods have been known
about how to carry out coating of a surface of sheet material which
consists of cloth, paper or the like by the transparent resin film,
but all needed a large-scale production equipment or the apparatus
of exclusive use. Further, since a tacky layer or a transparent
resinous film prepared on a surface of a sheet material is easily
inseparable from the sheet material, there has been a problem that
classifying and discarding according to material is impossible.
[0003] Therefore, a first object of the present invention is to
provide a method for easily and cheaply manufacturing a
resin-coated sheet which has a transparent resinous film having a
smooth surface, and which can be easily classified and discarded
according to material.
[0004] Further, a second object of the present invention is to
provide a method for easily and cheaply manufacturing a tacky
resin-coated sheet which is strippable for any number of uses and
which can be easily classified and discarded according to
material.
DISCLOSURE OF THE INVENTION
[0005] In order to achieve the above-mentioned first object, the
present invention provides a method for manufacturing a
resin-coated sheet, comprising the steps of: infiltrating an
aqueous emulsion of a non-tacky or weakly tacky acrylic copolymer
having water as a main evaporation ingredient into a
moisture-permeable sheet material throughout almost the entire
range in its thickness direction; placing a non-moisture-absorptive
protection sheet which has a smooth surface on and in close contact
with one side of the resultant sheet material and then drying the
sheet material; and forming a transparent coating film which has a
smooth surface and comprises a dried non-tacky or weakly tacky
acrylic copolymer, on one side of the sheet material by stripping
the protection sheet from the sheet material.
[0006] According to the above-mentioned method, it is possible to
manufacture a resin-coated sheet which has at one side thereof a
transparent dry coating film of an acrylic copolymer having a
smooth surface, without needing a large-scale production equipment.
Further, since the transparent coating film having a smooth surface
is formed by drying a non-tacky or weakly tacky acrylic copolymer
which has infiltrated into the sheet material, it is strongly
joined to the sheet material and there is no fear of peeling off
carelessly from the sheet material. Moreover, although a dried
transparent coating film of an acrylic copolymer having a smooth
surface demonstrates good waterproofness to the sheet material, the
acrylic copolymer can be easily separated from the sheet material
by soaking the resin-coated sheet in warm water etc., and agitating
it. Therefore, it is possible to manufacture a resin-coated sheet
which is easy to classify and discard according to material and is
easy to reuse.
[0007] In the above-mentioned method, preferably, after the sheet
material has dried, a strongly tacky coating film is formed on the
other side of the sheet material, by applying an aqueous emulsion
of a strongly tacky acrylic copolymer wholly or partially to the
other side of the sheet material, and drying it. According to this
constitution, an aqueous emulsion of a strongly tacky acrylic
copolymer can join up strongly to the non-tacky or weakly tacky
acrylic copolymer which has infiltrated into the sheet material and
dry, and therefore, a strongly tacky coating film which is made by
drying the strong tacky acrylic copolymer will not peel off
carelessly from the sheet material. Accordingly, the back side of
the resin-coated sheet which is covered with the transparent
coating film of the acrylic copolymer having a smooth surface at
one side can be stuck on various kinds of components via the strong
tacky coating film, and it can be used repeatedly by stripping it.
Moreover, since the transparent coating film in one side and the
strongly tacky coating film in the other side are comprised of dry
acrylic copolymers, it is possible to easily separate these acrylic
copolymers from the sheet material by soaking the resin-coated
sheet into warm water etc., and agitating it. Accordingly, it is
possible to provide a resin-coated sheet which has a tacky back
side and which is easy to classify and discard according to
material and is easy to reuse.
[0008] In the above-mentioned method, preferably, a strongly tacky
coating film is formed on a surface of the transparent coating
film, by wholly or partially applying an aqueous emulsion of a
strongly tacky acrylic copolymer to the surface of the transparent
coating film which has been formed on the one side of the sheet
material, and drying it. According to this constitution, since the
strongly tacky coating film is formed on the surface of the
transparent coating film which is formed on the one side of the
sheet material, the surface of the transparent coating film formed
on the one side of the sheet material can adhere to the glass
surface etc. via the strongly tacky coating film. Furthermore,
since the strongly tacky coating film consists of a dry strongly
tacky acrylic copolymer, it can be transparentized by making
thickness thin. Accordingly, when figures, characters, patterns,
etc. are in the one side of the sheet material and the surface of
the transparent coating film is stuck on a surface of a grass
board, etc. via the strongly tacky coating film, the figures,
characters, patterns, etc. of the sheet material can be seen
through the transparent glass board, the strong tacky coating film,
and the transparent coating film. Therefore, a tacky resin-coated
sheet which is rich in ornament nature can be manufactured
easily.
[0009] Further preferably, after the protection sheet has been
stripped from the one side of the sheet material, an aqueous
emulsion of a non-tacky or weakly tacky acrylic copolymer is
infiltrated into the other side of the sheet material; the sheet
material is then dried while a non-moisture-absorptive protection
sheet having a smooth surface is kept in close contact with the
other side of the sheet material; and a transparent coating film
consisting of a dry non-tacky or weakly tacky acrylic copolymer and
having a smooth surface is formed on the other side of the sheet
material by stripping off the protection sheet from the other side
of the sheet material. According to this constitution, a
resin-coated sheet which has transparent coating films in the both
sides of the sheet material and is excellent in the waterproofness
can be manufactured easily and cheaply.
[0010] Further preferably, a strongly tacky coating film is formed
on the surface of the transparent coating film of the other side of
the sheet material, by applying an aqueous emulsion of a strongly
tacky acrylic copolymer to the surface of the transparent coating
film wholly or partially and drying it. According to this
constitution, the resin-coated sheet excellent in the
waterproofness which has the transparent coating film of an acrylic
copolymer having the smooth surface on both sides of the sheet
material, and has the tackyness by the strongly tacky coating film
on the transparent coating film in one side or both sides can be
manufactured easily and cheaply.
[0011] Further preferably, the aqueous emulsion of the non-tacky or
weakly tacky acrylic copolymer is beforehand applied to the surface
of the protection sheet, and the sheet material is thereafter stuck
on the surface to infiltrate the aqueous emulsion into the sheet
material. According to this constitution, since a proper quantity
of an aqueous emulsion of the non-tacky or weakly tacky acrylic
copolymer can be extended with a shape of film of mostly uniform
thickness on the protection sheet, the aqueous emulsion of the
non-tacky or weakly tacky acrylic copolymer can infiltrate to the
sheet material easily, broadly and almost uniformly. In addition,
work for making a transparent coating film of an acrylic copolymer
having a smooth surface can be efficiently carried out by leaving
the protection sheet until the non-tacky or weakly tacky acrylic
copolymer dries.
[0012] Further, in order to achieve the above-mentioned second
object, the present invention provides a method for manufacturing a
resin-coated sheet, comprising the steps of: infiltrating an
aqueous emulsion of a non-tacky or weakly tacky acrylic copolymer
into a moisture-permeable sheet material throughout almost the
entire range in its thickness direction; drying the sheet material;
and forming a strongly tacky coating film on one side or both sides
of the sheet material by applying an aqueous emulsion of a strongly
tacky acrylic copolymer to one side or both sides of the
aforementioned sheet material wholly or partially and drying
it.
[0013] According to the above-mentioned method, since the strongly
tacky coating film of the dry strongly tacky acrylic copolymer has
tackyness in the state of dryness, one side or both sides of the
resin-coated sheet can be stuck on the surface of various
components, and it can use, stripping repeatedly. And after
infiltrating an aqueous emulsion of a non-tacky or weakly tacky
acrylic copolymer into the sheet material and making it dry, an
aqueous emulsion of a strongly tacky acrylic copolymer is applied
wholly or partially to one side or both sides of the sheet material
and is dried. Therefore, a strongly tacky coating film can be
strongly joined to the non-tacky or weakly tacky acrylic copolymer
which is infiltrated into the sheet material and dried. Therefore,
there is no fear of the strongly tacky coating film peeling off
carelessly from the sheet material. Moreover, since a quantity of
the aqueous emulsion of the strongly tacky acrylic copolymer to be
applied to one side or both sides of the sheet material is
adjustable freely, an adhesive sheet in which the degree of
tackyness of one side or both sides can adjust easily can be
manufactured easily and cheaply.
[0014] Preferably, in each of the above-mentioned methods, the
sheet material consists of a cloth, paper, or sponge.
[0015] Further preferably, in each of the above-mentioned methods,
dryness of sheet material is performed at a temperature not more
than 160 degrees C. According to this constitution, after drying
the aqueous emulsion of the non-tacky or weakly tacky acrylic
copolymer or the aqueous emulsion of a strongly tacky acrylic
copolymer, it can be again made aqueous emulsion by soaking it in
warm water etc.. Therefore, it is possible to manufacture a
resin-coated sheet which is easy to classify and discard according
to material and is easy to reuse.
[0016] Further preferably, the aqueous emulsion of the non-tacky or
weakly tacky acrylic copolymer contains water of not less than 60
weight %, and, on the other hand, the aqueous emulsion of the
strongly tacky acrylic copolymer contains water of not less than 50
weight %. According to this constitution, since the aqueous
emulsions of these acrylic copolymers can have moderate viscosity,
the work for infiltrating these acrylic emulsions into the sheet
materials or the work for applying them can be carried out
easily.
BRIEF EXPLANATION OF THE DRAWINGS
[0017] FIGS. 1(a), (b), and (c) are front, side, and rear views
respectively showing a sheet material used in the method for
manufacturing a resin-coated sheet according to the present
invention.
[0018] FIGS. 2(a) and (b) are rear and cross-sectional views
respectively showing a manufacturing process of a resin-coated
sheet according a first embodiment of the present invention.
[0019] FIG. 3 is a view showing the next manufacturing process of
the resin-coated sheet according the first embodiment of the
present invention.
[0020] FIGS. 4(a) and (b) are rear and cross-sectional views
respectively showing the next manufacturing process of the
resin-coated sheet according the first embodiment of the present
invention.
[0021] FIGS. 5(a) and (b) are front and cross-sectional views
respectively showing an example of processing of the resin-coated
sheet manufactured by the first embodiment of the present
invention.
[0022] FIGS. 6(a) and (b) are cross-sectional and rear views
respectively showing a manufacturing process of a resin-coated
sheet according to a second embodiment of the present
invention.
[0023] FIGS. 7(a) and (b) are front and cross-sectional views
respectively showing an example of processing of the resin-coated
sheet manufactured by the second embodiment of the present
invention.
[0024] FIG. 8 is a cross-sectional view showing an alternative
example of manufacturing process of the resin-coated sheet
according to the second embodiment of the present invention.
[0025] FIGS. 9(a) and (b) are cross-sectional views respectively
showing an example of processing and a manufacturing process of a
resin-coated sheet according to a third embodiment of the present
invention.
[0026] FIG. 10 is a cross-sectional view showing an alternative
example of manufacturing process of the resin-coated sheet
according to the third embodiment of the present invention.
[0027] FIGS. 11(a), (b), and (c) are cross-sectional views
respectively showing an example of processing and a manufacturing
process of a resin-coated sheet according to a fourth embodiment of
the present invention.
[0028] FIGS. 12(a) and (b) are cross-sectional views respectively
showing an example of processing and a manufacturing process of a
resin-coated sheet according to a fifth embodiment of the present
invention.
[0029] FIGS. 13(a), (b), (c), and (d) are cross-sectional views
respectively showing an example of processing and a manufacturing
process of a tacky resin-coated sheet according to a sixth
embodiment of the present invention.
[0030] FIG. 14 is a cross-sectional view showing an alternative
example of manufacturing process of the resin-coated sheet
according to the sixth embodiment of the present invention.
BEST MODE FOR CARRYING OUT THE INVENTION
[0031] Embodiments of the present invention are explained
hereinafter in conjunction with the drawings.
[0032] FIGS. 1 to 5 show a manufacturing process of a resin-coated
sheet according to a first embodiment of the present invention.
Referring to these Figures, the sheet material 2 shown in FIGS.
1(a), (b), and (c) is prepared first in this process. FIG. 1(a)
shows a front side of the sheet material 2, (b) shows a side
surface, and (c) shows a back side. The sheet material 2 can be
made of a cloth, paper, or the like. In this case, a favorite
figure, character, pattern, etc. may be printed on one side or both
sides of the cloth, paper, or the like. On the other hand, an used
clothing, curtain cloth and a poster, a picture postcard, a
photograph, etc. can also be reused.
[0033] Next, as shown in FIGS. 2(a) and (b), an aqueous emulsion of
a non-tacky or weakly tacky acrylic copolymer 4 is beforehand
applied to a non-moisture-absorptive protection sheet 3 such as,
for example, a cellophane film sheet, celluloid etc., and a front
side (one side) of a sheet material 2 is piled up on it.
Accordingly, preferably the aqueous emulsion of the non-tacky or
weakly tacky acrylic copolymer 4 is infiltrated into the sheet
material 2 mostly throughout the direction of thickness thereof. At
this time, as shown in FIG. 3, a non-moisture-absorptive protection
sheet 5 such as a cellophane film sheet, celluloid etc. is also
applied to the back surface (the other side) of the sheet material
2, and when a roller 6 is pressed and rolled thereon, the non-tacky
or weakly tacky acrylic copolymer 4 of a proper quantity can be
uniformly and sufficiently infiltrated into the sheet material 2.
Although illustration is omitted, pressure may be applied to the
sheet material 2 by letting the sheet material 2 sandwiched with
the protection sheets 3 and 5 pass between a pair of rollers.
[0034] In addition, the protection sheet 5 is stripped off to
secure a moisture-evaporating surface, and the sheet material 2 is
dried, while covering the one side of the sheet material 2 with the
protection sheet 3. It is desirable to perform dryness of the sheet
material 2 at the temperature of 160 degrees C or less.
[0035] After the sheet material 2 has dried together with non-tacky
or weakly tacky acrylic copolymer, as shown in FIGS. 4(a) and 4(b),
the protection sheet 3 is stripped from one side of the sheet
material 2, and is removed.
[0036] Then, as shown in FIGS. 5(a) and (b), a label 9, tag,
decoration, etc. which covered the one side (front side) with a
transparent coating film can be obtained if needed, by cutting the
sheet material 2 along with the outline of a pattern for example.
Moreover, since the completed resin-coated sheet 7 has an increased
rigidity due to the non-tacky or weakly tacky acrylic copolymer 4
which infiltrated into the sheet material 2 and was dried, it can
also be used as a sheet for crafts.
[0037] According to the above-mentioned method, it is possible to
manufacture a resin-coated sheet 7 which has at one side thereof a
transparent dry coating film 4 having a smooth surface which
comprises an acrylic copolymer, without needing a large-scale
production equipment. Further, since the transparent coating film 8
having a smooth surface is formed of the non-tacky or weak tacky
acrylic copolymer 4 which has been dried after infiltrated into the
sheet material 3, it is strongly joined to the sheet material 2 and
there is no fear of peeling off carelessly from the sheet material
2. Moreover, although the transparent dry coating film of the
acrylic copolymer 4 having a smooth surface demonstrates good
waterproofness to the sheet material 2, the acrylic copolymer 4 can
be easily separated from the sheet material 2 by soaking the
resin-coated sheet 7 in warm water etc., and agitating it.
Therefore, it is possible to manufacture a resin-coated sheet which
is easy to classify and discard according to material and is easy
to reuse.
[0038] Further, in the above-mentioned embodiment, since the
aqueous emulsion of the non-tacky or weakly tacky acrylic copolymer
4 is beforehand applied to the protection sheet 3 and the sheet
material 2 is stuck on the surface to infiltrating the aqueous
emulsion of the non-tacky or weakly tacky acrylic copolymer 4 into
the sheet material 2, a proper quantity of the aqueous emulsion of
the non-tacky or weakly tacky acrylic copolymer 4 can be extended
in the shape of a mostly uniform thick film on the protection sheet
3, and thus the aqueous emulsion of non-tacky or weakly tacky
acrylic copolymer 4 can be infiltrated easily, broadly and almost
uniformly to the sheet material 2. In addition, work for making a
transparent coating film 8 of the acrylic copolymer with a smooth
surface can be efficiently done by leaving the protection sheet 4
until the non-tacky or weakly tacky acrylic copolymer 4 dries.
[0039] FIGS. 6(a) and (b) show a second embodiment of the present
invention which is formed by adding modifications to the process of
the above-mentioned first embodiment. In the processing method of
the second embodiment, after the sheet material 2 into which the
aqueous emulsion of a non-tacky or weakly tacky acrylic copolymer 4
has been infiltrated as described above is dried and the protection
sheet 3 is stripped off, a strongly tacky coating film 12 is formed
on the other side of the sheet material 2 by applying an aqueous
emulsion of a strongly tacky acrylic copolymer 10 wholly or
partially to the other side (back side) of the sheet material 2, by
using a brush 11, spatula, etc., for example, and drying it. Then,
as shown in FIGS. 7(a) and (b), a label, tag, decoration, etc.
having a tacky back side can be obtained if needed, by cutting the
resin-coated sheet 7 into a favorite shape. In addition, as shown
in FIG. 8, the aqueous emulsion of the strongly tacky acrylic
copolymer 10 may be applied with the distribution form of many
points to the other side (back side) of the sheet material 2, or it
may be applied thereto with the shape of many lines or lattice, or
the shape of outlines of the pattern or figures.
[0040] According to this constitution, the aqueous emulsion of the
strongly tacky acrylic copolymer 10 joins up strongly to the
non-tacky or weak tacky acrylic copolymer 4 which has infiltrated
into the sheet material 2 and has dried, and dries. Therefore, a
strongly tacky coating film 12 which is made by drying the strong
tacky acrylic copolymer 10 will not peel off carelessly from the
sheet material 2. Accordingly, the back side of the resin-coated
sheet 7 which is covered with the transparent coating film 8 of the
acrylic copolymer having a smooth surface at one side can be stuck
on various kinds of components via the strong tacky coating film
12, and it can be used repeatedly by separating it. Moreover, since
the transparent coating film 8 in one side and the strongly tacky
coating film 12 in the other side are comprised of dry acrylic
copolymers 4 and 10, it is possible to easily separate these
acrylic copolymers 4 and 10 from the sheet material 2 by soaking
the resin-coated sheet 7 in warm water etc., and agitating it.
Accordingly, it is possible to provide the resin-coated sheet 7
which has a tacky back side and which is easy to classify and
discard according to material and is easy to reuse.
[0041] FIGS. 9(a) and (b) show a third embodiment of the present
invention which is formed by adding other modifications to the
above-mentioned first embodiment. In the third embodiment, an
aqueous emulsion of a strongly tacky acrylic copolymer 4 is applied
wholly or partially to the surface of the transparent coating film
8 which is formed on one side (front side) of the sheet material 2,
and it is dried to form a strongly tacky coating film 15 of the dry
and strongly tacky acrylic copolymer 14 on the surface of the
transparent coating film 8 of the dry and non-tacky or weakly tacky
acrylic copolymer 4. In addition, as shown in FIG. 10, the aqueous
emulsion of the strongly tacky acrylic copolymer 14 may be applied
with the distribution form of many points to the surface of the
transparent coating film 8, or it may be applied thereto with the
shape of many lines, lattice, or the shape of outlines of the
pattern or figures.
[0042] According to this constitution, since the strongly tacky
coating film 15 is formed on the transparent coating film 8 of the
non-tacky or weakly tacky acrylic copolymer which has been formed
on one side of the sheet material 2, the surface of the transparent
coating film 8 which has been formed on one side of the sheet
material 2 can adhere to a glass board, etc. via the strongly tacky
coating film 15. Furthermore, since the strongly tacky coating film
15 consists of the dry strongly tacky acrylic copolymer 14, it can
be transparentized by making thickness thin. Accordingly, when
pattern or characters, figures, etc. is in the one side of the
sheet material 2 and the surface of the transparent coating film 8
is adhered to a glass surface etc. via the strongly tacky coating
film 15, the pattern, characters, figures, etc. of the sheet
material 2 can be seen through the transparent glass board, the
strong tacky coating film 15, and the transparent coating film 8.
Therefore, the tacky resin-coated sheet 7 which is rich in ornament
nature can be manufactured easily.
[0043] FIGS. 11(a), (b) and (c) show a fourth embodiment of the
present invention which is formed by adding other modifications to
the above-mentioned first embodiment. In the process of the fourth
embodiment, after the aqueous emulsion of the non-tacky or weakly
tacky acrylic copolymer 4 has been infiltrated into the sheet
material 2 and the sheet material 2 is dry, the protection sheet 3
is stripped from the one side of the sheet material 2, and an
aqueous emulsion of a non-tacky or weakly tacky acrylic copolymer
16 which consists of the same composition as that of the
aforementioned non-tacky or weakly tacky acrylic copolymer 4 is
infiltrated into the other side of the sheet material 2. Then, the
sheet material 2 is dried while keeping a non-moisture-absorptive
protection sheet 17 having a smooth surface in close contact with
the other side of the sheet material 2. Then, a transparent coating
film 18 comprised of the dried non-tacky or weakly tacky acrylic
copolymer 16 and having a smooth surface is formed on the other
side of the sheet material 2 by stripping off the protection sheet
17 from the other side of the sheet material 2. Then, a label 19,
etc can be taken by cutting the resin-coated sheet 7 into a
favorite shape.
[0044] According to this constitution, the resin-coated sheet 7
which has the transparent coating film 8 and 18 consisting of the
acrylic copolymer 8 and 16 at the both sides of the sheet material
2 and is excellent in the waterproofness can be manufactured easily
and cheaply.
[0045] FIGS. 12(a) and (b) show a fifth embodiment of the present
invention which is taken by adding other modifications to the
process in the aforementioned first, third, or fourth embodiment.
In the process of the fifth embodiment, the strongly tacky acrylic
copolymer 14 is applied wholly or partially to the surface of the
transparent coating film 8 formed in one side of the sheet material
2 and is dried, so that the strongly tacky coating film 15 is
formed on the surface of the transparent coating film 8 in one side
of the sheet material 2. Also the strongly tacky acrylic copolymer
20 is applied wholly or partially to the surface of the transparent
coating film 18 formed in the other side of the sheet material 2
and is dried, so that the strongly tacky coating film 21 is formed
on the surface of the transparent coating film 8 in the other side
of the sheet material 2.
[0046] According to this constitution, the resin-coated sheet 7
which has the transparent coating films 8 and 18 which have smooth
surfaces and consist of the dried non-tacky or weakly tacky acrylic
copolymers 4 and 10 in the both sides of the sheet material 2 and
has tackyness according to the strongly tacky coating films 15 and
21 on the surfaces of the transparent coating films 8 and 21 in
both sides and which is excellent in the waterproofness can be
manufactured easily and cheaply.
[0047] FIGS. 13(a), (b), (c), and (c) show a manufacturing process
of the tacky resin-coated sheet according to a sixth embodiment of
the present invention. In the manufacturing process of this
embodiment, after an aqueous emulsion of a non-tacky or weakly
tacky acrylic copolymer 22 including water as a main evaporation
ingredient was infiltrated into the moisture-permeable sheet
material 2 throughout almost the entire range in its thickness
direction, the sheet material 2 is dried. At this time, a
protection sheet such as used in the aforementioned embodiments can
be omitted in this embodiment. Then, a transparent coating film 24
consisting of a dried strongly tacky acrylic copolymer 23 is formed
on one side (or both sides, although illustration is omitted) of
the sheet material 2, by applying an aqueous emulsion of a strongly
tacky acrylic copolymer 23 to one side (or both sides, although
illustration is omitted) of the sheet material 2 wholly or
partially and drying it. In this way, a single-sided adhesion tape
26 (or double sided adhesion tape, although illustration is
omitted) can be obtained by cutting out the created adhesive
resin-coated sheet 25 into a favorite shape.
[0048] According to the above-mentioned manufacturing process,
since the strongly tacky coating film 24 consisting of the dried
strongly tacky acrylic copolymer 23 has tackyness when dry, one
side or both sides of the resin-coated sheet 25 can adhere to the
surface of the several components via the strongly tacky coating
film 24, and it can peel off and be used repeatedly. Moreover,
since after the non-tacky or weakly tacky acrylic copolymer 22
which was infiltrated into the sheet member 2 has been dried, the
aqueous emulsion of the strongly tacky acrylic copolymer 23 is
applied either wholly or partially to the one side or both sides of
the sheet material 2 and is then dried, the strongly tacky coating
film 24 can be strongly joined to the non-tacky or weakly tacky
acrylic copolymer 22 which is infiltrated into the sheet material 2
and is dried. Accordingly, there is no fear of the strongly tacky
coating film 24 separating carelessly from the sheet material 2.
Moreover, since a quantity of the aqueous emulsion of the strongly
tacky acrylic copolymer 23 which is to be applied to the one side
or the both sides of the sheet material 2 is freely adjustable, it
is possible to easily and cheaply manufacture the one-sided or
double-sided adhesive sheet which can adjust easily the degree of
adhesion of one side or both sides.
[0049] For example, a cloth, paper, spongy sheet, etc. can be used
as the sheet material 2 in the sixth embodiment, and a used cloth,
paper, spongy sheet, etc. can be recycled. Moreover, the strongly
tacky acrylic copolymer 23 may be applied to the surface of the
dried non-tacky or weak tacky acrylic copolymer 22, in the shape of
distribution of many points or many lines, or in the shape of
lattice pattern, or in the shape of an outline of a figure or
pattern etc..
[0050] In the above-mentioned processes, preferably, dryness of the
sheet material 2 is performed at the temperature of 160 degrees C
or less. According to this constitution, after the aqueous emulsion
of the non-tacky or weakly tacky acrylic copolymer 4, 16 or 22 has
been dried, it can return to aqueous emulsion again by soaking the
sheet material 2 in warm water etc.. Therefore, it is possible to
manufacture the resin-coated sheets 7 and 25 which are easy to
classify and discard according to material and is easy to
reuse.
[0051] Further, in the above-mentioned embodiments, preferably, the
aqueous emulsion of the non-tacky or weakly tacky acrylic copolymer
4, 16 or 22 contains acrylic copolymer includes water of not less
than 60 weight % as a main evaporation ingredient. On the other
hand, preferably, the aqueous emulsion of the strongly tacky
acrylic copolymer 10, 14, 20 or 23 contains water of not less than
50 weight % as a main evaporation ingredient. According to this
constitution, since the aqueous emulsions of these acrylic
copolymers have moderate viscosity, it is possible to perform
easily the work for infiltrating the aqueous emulsions consisting
of these acrylic copolymers into the sheet material 2 or for
applying them on the sheet.
[0052] Preferably, the aqueous emulsion of the non-tacky or weakly
tacky acrylic copolymer 4 in the above-mentioned embodiments
contains an ethylene-acetic acid vinyl copolymer and an acetic acid
vinyl-acrylics copolymer as a solid ingredient. Moreover, the
aqueous emulsion of the strongly tacky acrylic copolymer 10
contains an acetic acid vinyl-acrylics polymer as a solid
ingredient preferably.
[0053] Although the present invention has been explained based on
the embodiments shown in the drawings. However, the present
invention is not limited only to the modes of the above-mentioned
and various modifications can be added to respective constituent
matters within the scope of the present invention. For example, in
case the aqueous emulsion of the strongly tacky acrylic copolymer
is applied, multilayer coating can be carried out making it dry for
each layer.
INDUSTRIAL APPLICABILITY
[0054] As apparent from the above explanation, according to the
present invention, it is possible to provide a method for
manufacturing easily and cheaply a resin-coated sheet which has a
transparent resinous coating film having a smooth surface and which
is easy to classify and discard according to material.
[0055] Moreover, according to the present invention, it is possible
to provide a method for manufacturing easily and cheaply an
adhesive resin-coated sheet which can be used many times if needed,
stripping repeatedly and which is easy to classify and discard
according to material.
* * * * *